问题

How long have you been away from your hometown — It has been twenty years ________ I went to college and work in Beijing.

A:unless
B:though
C:since
D:until;

正确答案是：

同类题型

You must concentrate _____ your study not on your clothes.

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How do you study English so well— I study ________ reading English magazines.

Don’t have so much junk food, Andy.—Sorry, I won’t. I’ll have more fruits and form a good eating _____.